Add version option - scroll - scrollbackbuffer program for st
 (HTM) git clone git://git.suckless.org/scroll
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       ---
 (DIR) commit 117d7db63f8b0c6fb4c00f1003d2577538a9f517
 (DIR) parent cbafbee9b7f97f09490e39a4994434e1c2008b0f
 (HTM) Author: Steve Ward <planet36@gmail.com>
       Date:   Fri,  1 May 2020 21:40:49 -0400
       
       Add version option
       
       Diffstat:
         M config.mk                           |       2 +-
         M scroll.c                            |      12 ++++++++++--
       
       2 files changed, 11 insertions(+), 3 deletions(-)
       ---
 (DIR) diff --git a/config.mk b/config.mk
       @@ -6,7 +6,7 @@ PREFIX        = /usr/local
        BINDIR        = $(PREFIX)/bin
        MANDIR        = $(PREFIX)/share/man
        
       -CPPFLAGS = -D_DEFAULT_SOURCE
       +CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_DEFAULT_SOURCE
        # if your system is not POSIX, add -std=c99 to CFLAGS
        CFLAGS = -Os
        LDFLAGS = -s
 (DIR) diff --git a/scroll.c b/scroll.c
       @@ -47,6 +47,8 @@
        
        #define LENGTH(X)        (sizeof (X) / sizeof ((X)[0]))
        
       +const char *argv0;
       +
        TAILQ_HEAD(tailhead, line) head;
        
        struct line {
       @@ -402,7 +404,7 @@ jumpdown(char *buf, size_t size)
        
        void
        usage(void) {
       -        die("usage: scroll [-Mh] [-m mem] [program]");
       +        die("usage: %s [-Mvh] [-m mem] [program]", argv0);
        }
        
        int
       @@ -411,10 +413,13 @@ main(int argc, char *argv[])
                int ch;
                struct rlimit rlimit;
        
       +        argv0 = argv[0];
       +
                if (getrlimit(RLIMIT_DATA, &rlimit) == -1)
                        die("getrlimit");
        
       -        while ((ch = getopt(argc, argv, "Mm:h")) != -1) {
       +        const char *optstring = "Mm:vh";
       +        while ((ch = getopt(argc, argv, optstring)) != -1) {
                        switch (ch) {
                        case 'M':
                                rlimit.rlim_cur = rlimit.rlim_max;
       @@ -424,6 +429,9 @@ main(int argc, char *argv[])
                                if (errno != 0)
                                        die("strtoull: %s", optarg);
                                break;
       +                case 'v':
       +                        die("%s " VERSION, argv0);
       +                        break;
                        case 'h':
                        default:
                                usage();